In the Red Corner
The Candidate: David Miliband
The Organisation: Progress, the Blairite magazine and campaign group previously led by Peter Mandelson
The Thinkers: Phil Collins (former No 10 adviser and speechwriter) and Richard Reeves (new director of the Demos think tank and former special adviser to Frank Field)
Cabinet backers: James Purnell, John Hutton Popular appeal: Instantly recognisable. Women like him
Back-bench support? Doubts about loyalty but centre right trusts him
In the Even Redder Corner
The Candidate: Jon Cruddas
The Organisation: Compass, increasingly influential left-wing campaign group within the Labour Party
The Thinkers: Neal Lawson (founder of Compass and managing editor of the Labour journal Renewal) and John Harris (pop music writer and Guardian columnist)
Cabinet backers: None Popular appeal: A “bit of a lad”. Unions like him, but an unknown quantity
Back-bench support? Liked by traditional Labour MPs and old Labour diehards, but modernisers see a dangerous lefty
By Martin Bright